Ham Radio General Class Test Emergency Communications and Public Service 2 — Questions and Answers
Question 1: What is the National Traffic System (NTS)?
- A federal highway communication network
- An ARRL-organized network of nets for passing formal written messages across the country (Correct answer)
- A digital mode used for emergency data relay
- A satellite backup system for emergency communications
Correct answer: An ARRL-organized network of nets for passing formal written messages across the country
The NTS is a network of local, section, region, and area nets organized by the ARRL to relay formal written traffic (Radiograms) across the country.
Question 2: What is a Radiogram in the context of the National Traffic System?
- A telegram sent via commercial telegraph using ham radio
- A formatted message with a preamble, address, text, and signature used for formal NTS traffic (Correct answer)
- A digital data packet transmitted over AX.25
- An emergency broadcast sent on a government frequency
Correct answer: A formatted message with a preamble, address, text, and signature used for formal NTS traffic
A Radiogram is the standardized ARRL message form with numbered preamble, precedence, station of origin, check, address, and text used in the NTS.
Question 3: What does the precedence 'EMERGENCY' mean on an NTS Radiogram?
- The message contains personal greetings from an emergency zone
- The message has the highest priority and concerns immediate threat to life or property (Correct answer)
- The message is from a government official
- The message must be delivered within 24 hours
Correct answer: The message has the highest priority and concerns immediate threat to life or property
EMERGENCY precedence indicates a message involving immediate danger to life or property and must be handled and delivered before all other traffic.
Question 4: What is the 'check' field in an NTS Radiogram?
- The callsign of the relay station
- The word count of the message text, used to verify accurate copy (Correct answer)
- The date the message was originated
- The frequency on which the message was sent
Correct answer: The word count of the message text, used to verify accurate copy
The check is the number of words in the message text and lets the receiving operator verify that the complete message text was received without omissions.
Question 5: Which net type in the NTS hierarchy handles traffic within a single ARRL section?
- Local net
- Section net (Correct answer)
- Region net
- Area net
Correct answer: Section net
Section nets gather traffic from local nets within an ARRL section and relay outgoing traffic to the region level while distributing incoming traffic to local nets.
Question 6: What is 'welfare' traffic in emergency communications?
- Messages requesting financial aid for disaster victims
- Messages inquiring about the health and safety of individuals in a disaster area (Correct answer)
- Official damage assessment reports to FEMA
- Requests for medical supply shipments
Correct answer: Messages inquiring about the health and safety of individuals in a disaster area
Welfare traffic conveys information about the health and safety of individuals in or near a disaster area and is typically third-highest in NTS precedence after EMERGENCY and PRIORITY.
Ham Radio General Class Test Emergency Communications and Public Service 2
What is the National Traffic System (NTS)?